I am confident that at least some people here are experimenting with the new “Ad Hoc at Home” cookbook by Thomas Keller. If you post your experiences here I will edit the header and take out the mushroom soup. BUT for now I will just discuss the soup.
Ad Hoc is, generally speaking, a departure from Keller’s previous cookbooks. “The French Laundry” and “Bouchon” have recipes that take several days to execute, in many cases. And if you follow exactly, he has you do very fussy and time consuming things. But his new Ad Hoc restaurant is a much less fussy place, there is not even a menu, you go eat whatever they are serving that night.
With all this in mind I thought his mushroom soup would be a snap, and volunteered to make it for a dinner party on last Saturday. What I learned was that it is really more of a throw-back to the other cookbooks. Of course I enjoyed making the soup but it was a little grueling.
First I had to find Cavolo Nero. I discussed that in a thread here and I thought I had it solved but when I went back to Wegman’s they were sold out. But I picked through the “normal” kale and found one bunch that had extra crinkly leaves, and the head produce guy confirmed that it was Cavolo Nero (lascinata or dinosaur kale). See below. I also had to buy a pound of Maitake or Hen of the Woods mushrooms but Wegmans nearly always has that.
I went to Costco to buy the 4 pounds of “regular” mushrooms (I bought mostly Baby Bellas) for the broth. I used the slicing blade of my cuisinart to cut everything up. I was surprised, the mushrooms nearly filled my stockpot. Once the mushrooms cooked they gave up most of their liquid and the broth turned dark and clear. It took a couple of hours just to put the broth together.
Then you have to slow cook carrots, leeks, and onions under a parchment lid for more than half an hour – throwing in garlic later on so it won’t burn. This gives you a sort of basis for the soup.
What made this a long recipe – each of the remaining constituents had to be cooked separately. The potato pieces are simmered in salted water and dried on a tray. The kale is de-veined, cut to 1" by 3" and blanched for 90 seconds in rapidly boiling salted water. The Maitake mushroom (which was like a big spherical sponge) is taken apart into “florets” (it has a structure like cauliflower) and sauteed with thyme and chopped shallots. Worst of all you need to have essentially a whole head of garlic turned into a fine puree. I actually was trying to push the stuff through a tamis when my wife pointed out it was time to go to the dinner party. I just gave up and put both the fine puree and the stuff that wouldn’t go through the tamis into the soup.
We took the hot broth in one pot and combined all the dry ingredients in the other to travel. Chef Keller says the wet and dry should be combined just before serving, so we managed to do that.
It was one of the most interesting soups I have tasted. He is right, the cavolo nero and the maitake give it a “dark” flavor that is intriguing, especially against the background of all that garlic and thyme. If you are a wine collector you know that the most “delicious” wine might not be the most “interesting” wine, some wines are “vins de contemplation.” This is a “soupe de contemplation”… I would make it again.
What recipes from Ad Hoc have YOU tried?







